What cannot be guaranteed
The result. A prediction is an estimate of probability against a price; the match is played by other people. Anyone guaranteeing winners is selling a promise they do not control, and they usually know it. It is the phrase that rules a service out fastest.
What can be guaranteed
Three concrete things: that the pick arrives before the match, that the result is published win or lose, and that the price is the one advertised. They are verifiable and they depend entirely on the seller. A service that delivers those three is trustworthy even in a bad month.

Compensation, which is not the same as a guarantee
Some services offer something in return when a play fails: another pick, a period of access, a partial refund. It does not make the bet safe, but it splits the risk between seller and buyer, and that changes the seller's incentives.
Why compensation aligns incentives
If failing costs the seller something, sending anything at all just to fill the day stops being convenient. That is the difference between a service paid for publishing and one paid for being right often. Always ask what happens on the seller's side when a play goes wrong.
Full refunds almost never exist
And that makes sense: the product has already been delivered. A service promising to refund everything whatever the outcome either does not intend to honour it or covers it by charging more. A low price with no refund is more honest than a high one with a promise that never gets executed.
How ours works
The pick is sold one at a time and the result stays published all the same. And there is a version with insurance: if that play fails, you keep three months of picks at no cost in your dashboard. It is not a guarantee of winning, it is compensation that can actually be honoured. See how it works →